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Red blood cells in a blood clot. SEM x3400. Red Blood Cells Red Blood Cells Blood Clots
Human red blood cells (erythrocytes) trapped in a fibrin blood clot. Platelets (not seen) are cell fragments in the blood that play an essential role in blood clotting and wound repair. Platelets serve as the body's first line of defense to prevent excessive blood loss. When an injury such as a cut is sustained, platelets change their shape (now known as activated platelets), become sticky, and build up on a vessel wall to form a plug. They are also involved in the secretion of a chemical... more »Human red blood cells (erythrocytes) trapped in a fibrin blood clot. Platelets (not seen) are cell fragments in the blood that play an essential role in blood clotting and wound repair. Platelets serve as the body's first line of defense to prevent excessive blood loss. When an injury such as a cut is sustained, platelets change their shape (now known as activated platelets), become sticky, and build up on a vessel wall to form a plug. They are also involved in the secretion of a chemical platelet factor which helps produce threads of fibrin. Bloods cells collect in the entangled fibrin and platelet mass forming a blood clot at the site. SEM X3400. « less
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